Server Side And Client Side Scripting(Computer Science > Javascript ) Questions and answers for exam Preparation

Question 1. What are the events generated by the Node objects called?

generators
emitters
dispatchers
highevents

Explanation:-

Answer: Option B. -> emitters

Question 2. What is the function used to remove all handlers for name events?

deleteAllListeners(name)
deleteListener(name,f)
removerListener(name,f)
removeAllListeners(name)

Explanation:-

Answer: Option D. -> removeAllListeners(name)

Question 3. What is the function used to deregister event handler ‘f’?

deleteAllListeners(name)
deleteListener(name,f)
removerListener(name,f)
removeAllListeners(name)

Explanation:-

Answer: Option C. -> removerListener(name,f)

Question 4. Which of the following is an event emitter?

once
process
listeners
on

Explanation:-

Answer: Option B. -> process

Question 5. Which function is a synonym for on()?

addListener()
listeners()
once()
add()

Explanation:-

Answer: Option A. -> addListener()

Question 6. When do uncaught exceptions generate events?

When handlers are registered
When handlers are deregistered
When handler functions are called
When handlers do not have a matching catch clause

Explanation:-

Answer: Option A. -> When handlers are registered

Question 7. Which among the following POSIX signals generate events?

SIGDOWN
SIGFLOAT
SIGINT
SIGSHORT

Explanation:-

Answer: Option C. -> SIGINT

Question 8. When the “end” event fires on EOF when no more data will arrive, which function is called?

s.on("data",f);
s.on("end",f);
s.on("error",f);
s.on("default",f);

Explanation:-

Answer: Option B. -> s.on("end",f);

Question 9. What is the method used to pause “data” events?

s.pause();
s.stop();
s.halt();
s.wait();

Explanation:-

Answer: Option A. -> s.pause();

Question 10. What will be the return value of the write() method when the Node cannot write the data immediately and has to buffer it internally?

0
1
True
False

Explanation:-

Answer: Option D. -> False